When you're traveling in traffic, you may often think bad thoughts about the person you're following, calling them bad names in your mind or even out loud.  This is what I saw on my way to work today, traveling through downtown on main street.  A literal horse's ass* instead of just a figurative one:


What's that you say?  This doesn't count as traffic?  Well, what you can't see was that there was ANOTHER trailer in front of it.  And a car.  BUSY.  This is the street Marty avoids because of all the traffic.

*Grandma, I hope you're not reading this one.  And if you are, sorry, but I'm only telling it like it IS.